Rikka Hishikawa

"The Light Of Wisdom! Cure Diamond!!"英知の光！キュアダイヤモンド！！Eichi no Hikari! Kyua Daiyamondo!!

Hishikawa Rikka (菱川 六花 Hishikawa Rikka?) is one of the main Cures in Doki Doki Pretty Cure GoGo!!!. She is one of Mana's childhood friends and the secretary of Oogai First Middle School's student council. Her Cure Ego is Cure Diamond (キュアダイヤモンドKyua Daiyamondo?).